Patch cable

Abstract

A shielded patch cable has a series of wires and a first foil of an electrical conductive material, the first foil surrounding the series of wires over their length. The patch cable also has a capacitor for preventing the formation of a grounding loop upon connection of the cable. The capacitor is formed by the first foil surrounded by an intermediate layer of an electrical insulating material, which insulating material is surrounded by a second foil of an electrical conductive material.

I claim: 
     
       1. A shielded patch cable comprising a series of wires and a first foil of an electrical conductive material, said first foil surrounding said series of wires over their length, said patch cable further comprising a capacitor for preventing the formation of a grounding loop upon connection of the cable, said capacitor being formed by said first foil surrounded by an intermediate layer of an electrical insulating material, said insulating material is surrounded by a second foil of an electrical conductive material and said patch cable further comprising a first connector mounted on a first extremity of said wires and a second connector mounted on a second extremity of said wires, said first connector comprising a shield of electrical conductive material connected with said first foil, said second connector comprising a shield of electrical conductive material connected with said second foil, and said patch cable further comprising an insulating element mounted between said first extremity of said wires and said first connector, said insulating element being provided for preventing said second foil from electrically contacting said first connector. 
     
     
       2. A shielded patch cable according to claim 1, wherein each of said foils comprises an aluminium layer. 
     
     
       3. A shielded patch cable according to claim 2, wherein said intermediate layer is formed by a polyester layer applied on one side of at least one of said aluminium layers. 
     
     
       4. A shielded patch cable according to claim 3, wherein said intermediate layer is formed by an insulating strip. 
     
     
       5. A shielded patch cable according to claim 4, further comprising a first drain wire electrically contacting said first foil and a second drain wire electrically contacting said second foil. 
     
     
       6. A shielded patch cable according to claim 2, wherein said intermediate layer is formed by an insulating strip. 
     
     
       7. A shielded patch cable according to claim 2, further comprising a first drain wire electrically contacting said first foil and a second drain wire electrically contacting said second foil. 
     
     
       8. A shielded patch cable according to claim 1, further comprising a first drain wire electrically contacting said first foil and a second drain wire electrically contacting said second foil. 
     
     
       9. A method for manufacturing a shielded patch cable comprising a series of wires, a first connector having a shield of electrical conductive material mounted on a first extremity of said wires and a second connector having a shield of electrical conductive material mounted on a second extremity of said wires, said method comprising the steps of: applying a first foil of an electrically conductive material around said wires;   applying an intermediate layer of an electrically insulating material around said first foil;   applying a second foil of an electrically conductive material around said intermediate layer;   connecting said first foil with the shield of electrical conductive material of said first connector;   connecting said second foil with the shield of electrical conductive material of said second connector;   mounting an insulating element between said first extremity of said wires and said first connector, said insulating element being provided for preventing said second foil from electrically contacting said first connector.   
     
     
       10. A method according to claim 9, wherein said conductive material of said foils include an aluminium layer and wherein at least one of said foils has a polyester layer applied thereto, said foils being applied in such a manner that said polyester layer is located between said aluminium layers. 
     
     
       11. A shielded patch cable comprising a series of wires, a first foil of an electrical conductive material, said first foil surrounding said series of wires over their length and forming a first overlapping section over the length of the cable, said first foil being surrounded by a second foil of an electrical conductive material, said second foil forming a second overlapping section over the length of the cable, said first and second foils being located in such a manner that said overlapping sections are not mutually overlapping said patch cable further comprising a first connector mounted on a first extremity of said wires and a second connector mounted on a second extremity of said wires, said first connector comprising a shield of electrical conductive material connected with said first foil, said second connector comprising a shield of electrical conductive material connected with said second foil, and said patch cable further comprising an insulating element mounted between said first extremity of said wires and said first connector, said insulating element being provided for preventing said second foil from electrically contacting said first connector.